Google Vertex AI Agent Builder vs LangSmith

Google Vertex AI Agent Builder plans

• Search Standard Edition$1.50 a month
• Search Enterprise Edition$4 a month
• Advanced Generative Answers$4 a month
• Configurable Query UnitPriced on request
• Configurable Storage UnitPriced on request

LangSmith plans

• DeveloperFree
• Plus$39 a month
• EnterprisePriced on request

Pick Google Vertex AI Agent Builder if…

You want what its maker publishes above — check its page for the details.

Pick LangSmith if…

LangSmith suits teams building or operating AI agents that need evaluation, prompt workflows, and observability. It supports both hosted and self-hosted deployment options.